Autocrat vs Autocratic - What's the difference?

As a noun autocrat

is an absolute ruler with infinite power.

of or pertaining to autocracy or to an autocrat; absolute; holding independent and arbitrary powers of government.

(en noun)

An absolute ruler with infinite power

A title borne by some such Monarchs, as in Byzantium and tsarist Russia

* autocrator * big man * despot * dictator * * monarch * tyrant

(en adjective)

Of or pertaining to autocracy or to an autocrat; absolute; holding independent and arbitrary powers of government.

In recent times the British prime minister has become increasingly autocratic .

Of or pertaining to the manner of an autocrat.

Despite his lack of any actual authority his autocratic demeanour annoyed many of his colleagues.

* despotic * dictatorial